package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    @Override
    public PageResult queryByPage(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.select(setmealPageQueryDTO);
        PageResult pageResult = new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    @Override
    @Transactional
    public void addSetmeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insert(setmeal);
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmeal.getId());
        });
        setmealDishMapper.insert(setmealDishes);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        if (status.equals(StatusConstant.ENABLE)) {
            List<Long> dishIds = setmealDishMapper.getDishIdsBySetmealId(id);
            List<Dish> dishes = dishMapper.selectByIds(dishIds);
            dishes.forEach(dish -> {
                if (dish.getStatus().equals(StatusConstant.DISABLE)) {
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
        Setmeal setmeal = Setmeal.builder().status(status).id(id).build();
        setmealMapper.update(setmeal);
    }

    @Override
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.selectById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getSetmealDishBySetmealIds(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    @Override
    @Transactional
    public void editSetmeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.update(setmeal);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        List<Long> list = new ArrayList<>();
        list.add(setmealDTO.getId());
        setmealDishMapper.deleteBatch(list);

        if (setmealDishes != null && setmealDishes.size() > 0) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealDTO.getId());
            });
            setmealDishMapper.insert(setmealDishes);
        }
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        for (Long id: ids) {
//            Dish dish = dishMapper.getById(id);
//            if (dish.getStatus() == StatusConstant.ENABLE) {
//                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
//            }
//        }
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.selectById(id);
            if (setmeal.getStatus().equals(StatusConstant.ENABLE)) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        setmealMapper.deleteBatch(ids);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
